单项选择题
（）means a technique using digital codes which enables a radio station to establish contact with, and transfer information to another station or group of stations and complying with the relevant recommendations of the CCIR.
A.DSC
B.MSI
C.EGC
D.NBDP
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相关考题
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单项选择题
（）means navigational and meteorological warnings, meteorological forecasts and other urgent related messages broadcast to ships.
A.Navigational broadcast
B.weather forecast
C.Urgency message
D.Maritime Safety Information -
单项选择题
（）is designed to send an automatic distress alert when a ship sinks suddenly.
A.Lifeboat
B.A survival craft
C.An EPIRB
D.A SART -
单项选择题
（）process the distress signal from EPIRB to determine its position and identity.
A.COSPAS-SARSAT
B.Ground receiving stations
C.storing distress signal
D.Near-polar orbiting satellites
